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基于2014年第10号强台风“麦德姆”登陆前后福建平潭岛海岸前丘、爬坡沙丘、横向沙丘和沙席等海岸沙丘形态的高精度测量数据,分析了典型海岸沙丘在台风登陆前后的形态变化,初步总结了华南海岸风沙地貌形态的台风响应模式。结果表明:4类典型海岸沙丘在台风“麦德姆”登陆前后的形态变化较大且主要是以体积减小和沙丘高度降低为主,测点高程的平均变化值为0.22 m,样区海岸沙丘体积平均减小0.59%,测点高程变化的平均值为高度降低0.05 m,但不同类型海岸沙丘及其不同部位的响应变化并非一致且存在较大差异,此与台风“麦德姆”的强侵蚀力及不同海岸沙丘的形态及其下伏地形、表面植被分布等的差异有关。
Based on the high-precision measurements of the morphology of coastal sand dunes before and after the typhoon No. 10 “Madame” in 2014, such as the front hills, the climbing sand dunes, the horizontal dunes and the sand seats on the shore of Pingtan Island in Fujian Province, the effects of typical coastal dunes on the typhoon The morphological changes before and after the landfalling are summarized in this paper. The typhoon response patterns of the sandstorm morphology in South China Coast are summarized. The results show that the morphological changes of four typical coastal dunes before and after the typhoon “Medem” landing are mainly large with the decrease of volume and the decrease of dune height, and the average change of the elevation of the measuring point is 0.22 m The average sand dune volume in the coastal area decreased by 0.59% on average, and the average elevation at the measuring point decreased by 0.05 m in height. However, the responses of different types of sand dunes and their different parts were not consistent and varied greatly. Mu "strong erosive power and different coastal sand dunes morphology and the underlying topography, surface vegetation distribution differences.